Compilare: user.cpp: In function ‘void sum(int)’: user.cpp:27:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] B[++B[0]] = T; ^ user.cpp: In function ‘int main()’: user.cpp:48:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i][A[i][0]] = aux % 10; ^ user.cpp:57:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] C[C[0]] = aux % 10; ^ user.cpp:37:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.in", "r", stdin); ^ user.cpp:38:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.out", "w", stdout); ^ user.cpp:39:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^